A250mm wide and 25mm thick plate is to be reduced in a single pass in a 2-high rolling mill to final thickness of 20mm. the roll has a radius of 250mm and its speed is 19.1 rev/min. the work material has a strength coefficient of 240mpa and a strain hardening exponent 0.2. determine a) the roll force, f b) the roll torque, t c) power, p, required to accomplish the operation.

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

During a steady flow process, the change of energy with respect to time is zero. a)- true b)- false

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?